Five people have been left stranded 21 stories underground at the Grand Canyon Caverns' tourist attraction for almost 24 hours.

The elevator reportedly malfunctioned Sunday evening, according to authorities on Monday night.

Coconino Sheriff’s Office confirmed that the visitors were not confined to an elevator car, and have been made comfortable in the caverns.

They have been able to use the adjacent hotel suite while they await a suitable ride to the surface in Peach Springs, Arizona.

Spokesman Jon Paxton said that the guests are unable to get escape the caverns because the stairway system is similar to an old external fire escape and there are concerns about safety.